This one gets to me every time, although I suppose it's as much the message as the song, very moving. Check Bono out @ around 4.20mins, he's in awe of the big fella, rightly so.
[youtube]http://www.youtube.com/watch?v=PIvn1oOVcVQ[/youtube]
[youtube]http://www.youtube.com/watch?v=PIvn1oOVcVQ[/youtube]